Watch : See Kendall Jenner Join Kylie Jenner's Date Night With Timothée ChalametThe Kardashians are keeping up with Kylie Jenner and Timothée Chalamet's romance. In fact, Khloe Kardashian recently hosted a family dinner where the Kylie Cosmetics mogul and her boyfriend of three years partied until the early morning hours. "It was so nice," the Khloe in Wonder Land host told Kim Kardashian on the Jan. 28 episode of her podcast. Kim, 45, went on to note that their 28-year-old sister didn't leave the party until "1:30 in the morning." Khloe added, "Her and Timmy had the best time."